Furnace for heating metals



2 SheetsSheet 1.

(No Model.)

- W. BAILEY.

EURNAGEFOR HEATING METALS.

No. 555,554. Patented Mar. 3, 1896.

(No Model.) h 2 Sheets-Sheet 2.

W. H. BAILEY. FURNACE FOR HEATING METALS.

No. 555,554. Patented Mar. 3, 1896.

WITNESEES- INSIENTUR UNITED STATES PATENT OEEicE.

WILLIAM HENRY BAILEY, OF MUNCIE, INDIANA.

FURNACE FOR HEATING METALS.

SPECIFICATION forming part of Letters Patent No. 555,554, dated March 3,1896.

Application filed March 5, 1895. Serial No. 540,615. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM HENRY BAI- LEY, a citizen of the UnitedStates, residing at Muncie, in the county of Delaware and State ofIndiana, have invented certain new and useful Improvements in Furnacesfor Heating Metals; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The invention relates to certain new and useful improvements in furnacesfor heating metal; and it consists of a furnace provided with twoheating-chambers which communicate with each other by means of suitableflues, having arranged therein suitable dampers, whereby heat may bedirected from one chamber to the other, as may be desired.

Heretofore it has been necessary to employ two furnaces for that classof mills commonly called sheet-mills and tin-mills, one to heat themetal bars or billets before being rolled into sheets, previous to beingrolled to proper gage and finish.

It is the object of this invention to produce a single furnace in whichboth of the heating operations can be performed, utilizing the wasteheat from one chamber of the furnace to the other and economizing space,as a single furnace can be made much more compact than two separatefurnaces. Moreover, a single furnace can be managed with much less laborthan two separate furnaces, which tends to economize the manufacture ofmetallic sheets. This object is attained by means of the structureillustrated in the accompanying drawings, in which- Figure 1 representsa side elevation of my improved furnace; Fig. 2, a front elevation ofthe same; Fig. 3, a transverse vertical section on line 3 3 of Fig. 1;Fig. 4, a longitudinal vertical section, and Fig. 5 a transversevertical section on line 5 5 of Fig. 4.

Referring to the drawings, the numeral 1 indicates the walls of thefurnace, which are constructed of brickwork, braced and held together bythe vertical T shape of angle irons 2 and the brace-rods 3.

The numeral 4 indicates the fire or combustion. chamber of the furnace,and 5 a bridge-wall built up from the floor, forming the front of thefire-chamber and dividing the same from a heating-chamber 6, which Iwill designate as the pair-heating chamber. This chamber is situatedimmediately in front of said fire-chamber, and has an elevated hearth 7,built up of brickwork from the floor to form a support for the metalbars or billets which are to be heated in said chamber.

The numeral 8 indicates a bridge-wall constructed of brickwork andextending from thefoundation of the furnace to near the upper partthereof, terminating below the top of the chamber to form a passage-way9, between its upper edge and the roof, which leads into a secondheating-chamber 10,which will be hereinafter referred to as thesheetheating chamber.

The roof the furnace is arched from front to rear, as shown in Figs. 3,4, and 5, and the sheet-heating chamber is formed with an arched bridge11, which extends a short distance from the bridge-Wall 8, forming acontinuation of the passage-way 9. The front wall of this chamber, whichis also the front wall of the furnace, is constructed of brickwork andhas built upon it the smoke-stack 12, which is cylindrical incross-section and lined with fire-brick. The stack is supported upon aflangediron collar 13, which rests upon iron girders 14. supported. bythe brickwork of the furnace.

In the center of the arched roof of the furnace, at a point near theforward part of the pair-heating chamber, is an exit 15 communicatingwith a flue 16, which extends to and enters the smoke-stack at its base.This flue is provided with a damper 17 for controlling the escape of theproducts of combustion and regulating the draft of the furnace, and alsofor directing the heat from the pair-heating chamber into thesheet-heating chamber.

Each side wall of the sheet-heating chamber is provided with an exit 18,which communicates with a flue 19, extending upwardly through said sidewalls and the arched roof, and communicating with the smoke-flue 16.These flues are provided with dampers 20 and 21 for controlling andregulating the heat in the sheet-heating chamber, and also forcontrolling the escape of the products of combustion.

The combustion-chamber is provided with the usual door 22 for firin g,an d the pair-heat ing chamber with a door 23 for charging and removalpurposes, both doors bein g preferably at one side of the furnace.

The sheet-heatin g chamber is provided with an inclined bottom Ell,inelinin g from front to rear, and doors 25 are provided at the frontfor the insertion and removal of the metal sheets.

The operation of the invention is as follows The bars or billets ofmetal, which require a high temperature for working, are placed into thepair-heating chamber and heated in the usual manner. After beingproperly heated the bars or billets are removed from the chamber andsupplied in pairs to the rolls, when they are rolled into blanks orsheets of suitable size. These blanks or sheets are then placed in thesheet-heating chamber and reheated for further rolling and finishing.

The pair-heating chamber is of the usual construction employed inrolling-mills; but the heat which in this class of furnaces passes upthrough the flue with the products of combustion. is utilized forheating the sheets, thereby effecting a great saving in fuel. Instarting,when a high degree of heat is required for heating the bars orbillets of metal, the products of combustion may be allowed to passdirectly to the smoke-stack. Afterward when good combustion is obtainedthe heat is directed through the passage-way 9 into the sheet-heatingchamber to heat the sheets, the degree of heat in both chambers beingregulated and controlled by the dampers.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A furnace for heating metals, comprisin g a single fil0*0ll&l111)61,&pair-heatin g chamber and a sheet-heating chamber, the firechamberconnected with the pair-heating chamber bya passage-way through thedivision-wall, and the pair-heating chamber connected with thesheet-heatin g chamber also by a passage-way, a smoke-stack separatefrom the several chambers but connected with the sheet-heating chamberby damper-controlled fines leading through the side walls of saidchamber, and fines connecting the pair-heating chamber with thesmoke-stack and controlled by dampers, whereby the products ofcombustion may be directed through said pairheating chamber or throughthe sheet-heating chamber, as desired.

2. A furnace for heating metals, comprising a fire-chamber, apair-heating chamber, and a sheet-heating chamber, the pair-heatingchamber partially separated from the firechamber by a low wall, thesheet-heating chamber separated from the pair -heatin g chamber by awall having an arched bridge extending therefrom into said sheet-heatingchamber and a passage-way above said wall and bridge connecting the twochambers together, a smoke-stack separate from. the several chambers, aflue leading from the pairheating chamber through the crown, of the furnace to the smoke-stack flucs leading from the sheet-heating chamberthrough the side walls of said chamber to said smoke-stack, and damperslocated in said flues, whereby the heat and products of combustion maybedirected through first one heating-chamber and then the other,substantially as specified.

In testimony whereof I affix my signature in the presence of twowitnesses.

WILLIAM HENRY BAILEY.

Witnesses:

Roscon O. Gininrrrn, 0. P. Jones.

